Means for controlling the potential gradient in alpha conductor



April 27, 1926. 1,582,060

D. R. LOVEJOY MEANS FOR CONTROLLING THE POTENTIAL GRADIENT I A CONDUCTORFiled Nov. 10; 1925 Patented Apr. 27, 1926.

UNITED STATES PATENT OFFICE.

DIMMITT ROSS LOVEJ'OY, OF NEW YORK, N. Y., ASSIGNOR TO ILOVIEJ'OYDEVELOP- MENT CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEWYORK.

MEANS on CONTROLLING THE POTENTIAL GRADIENT IN A ooNnooToa.

Application filed November 10, 1925. Serial No. 68,247.

To aZZ whom it may concern:

Be it known that I, DIMMITT Ross LovE- JOY, a citizen of the UnitedStates, and a resident of the city, county, and State of s New York,have invented certain new and useful Improvements in Means forControlling the Potential Gradient ina Conductor, of which the followingis a specification.

10 in potential in a conductor vary from uniformity in some particularway. Such instances often arise in radio circuits. More-.

over the character of such variation may require changesfrom time totime to suit different conditions. Resistances are in general madeuniform in value from one end to another as in the case of a carbon rodor a wire coil.

My invention comprises a means of utiliz- 19 ing such uniformresistances to produce a potential gradient of any desired character aswill be better understood from the following description in connectionwith the single figure of the accompanying drawing which shows indiagrammatic form an embodiment of my invention.

A. 13. represents a uniformly wound resistance of relatively high valueas compared with another uniformly wpund resistance 39 D. E. A source Fcauses a flow of current in D; E. and there will be a uniform drop ofpotential therein. In A. B. it is desired to establish a potentialgradient-which is not uniform.

This is accomplished by means of a plurality of cross connections P. G.to m. 0. and by suitably adjusting these, any point on A. B. may beimpressed with the potential of any point on D. E.

C and Z represent output or work terminals one or both of which may beadjustable along the gradient resistance A. B.

Thus Z may be adjusted initially and then remain fixed and 0 moved backand forth in synchronism. with. some other device. In this case thevoltage impressed upon G will vary not in proportion to its movement butin proportion to the various potentials impressed upon the resistance A.B. between Z and C at different points. It is sometimes desired to havethe drop I claim 1. Means of controlling the potential gradient in aconductor, comprising, a resistance connected to a source of current, aresistance connected to an output circuit and a series of adjustablecross connections between the two resistances.

29 Means of controlling the potential gradient in a conductor,comprising, a resistance uniform in value throughout its length,connected to a source of current, a second uniform resistance connectedto a work circuit and a series of cross connections between theresistances with means for connecting the terminals of the crossconnections at any desired points on the said resistances.

3. Means of controlling the potential gradient in a conductor,comprisingya resistance of uniform value connected to a source ofcurrent, a second resistance of uniform value but of higher value thanthe other resistance and a plurality of cross connections between thetwo resistances, the said cross connections having means for connectingthem at various points along the resistances.

4:. Means of controlling the potential gradient in a conductor,comprising, a re v sistance connected to a source of current, a

resistance connected adjustably to an output circuit and 'a series ofadjustable cross connections between the two resistances.

DIMWITT ROSS LOVEJOY.

